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Originally Posted by Belisarius
You seem to be assuming technical implementation and licensing are the same thing. I'm wondering if anyone has actually confirmed that Windows XP will recognize multiple cores in excess of the socket licensing limitations.
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Ok, now I have to be a bit mean, but,
can you read? Do not make the assumption that I've made a mistake without taking the time to perform a quick google search.
I specifically said that TECHNICALLY the OS sees the two cores as two separate processors (though schedules them like Hyperthreaded Processors). To licensing (that is, to the difference between XP Home/Pro in terms of # of processors), it is just a single processor.
I'm going to say this one last time, link you to Microsoft's docs, and you should be on your way.
1 processor 1 core = XP Home
1 processor 2 cores = XP Home
1 processor n cores = XP Home
2 processors 1 coreperproc = XP Pro
2 processors 2 coresperproc = XP Pro
2 processors n coresperproc = XP Pro
I don't believe this can be any clearer.
Read this to read exactly what I just said.
Here's the google search that will turn up just what I said. Someone should write an article on google searches.
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Originally Posted by Belisarius
As for the claims that Redhat et al. licensed on a per-core basis, I'm going to say you need to provide documentation for that claim - the only major holdout I knew of in this regards was Oracle (and technically IBM, but only in regards to their PowerPC chips, so it doesn't affect 99% of the market).
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I said:
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Originally Posted by AssKoala
On a side note, it's important to note that RedHat, IBM, and others license on a per core basis (or did).
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See that "or did"? I was not saying they are currently per core, but they most certainly were almost 2 years ago. Windows 2000 is technically per core licensed since the kernel cannot make a distinction between a physical processor and a core (Linux had the same issue when multicore processors were hitting the market, support had to be added).
Link on Oracle licensing
According to that link, RedHat and Novell follow the same system as Microsoft.
If you want empirical evidence, head over to
2cpu.com's forums and look at the people running dual dual-core opteron boxes on Windows XP Pro.
The answer to the Original Question is No, Windows XP Home will run a Pentium D just fine and utilize both cores.